Gate Valve Series

A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar. The gate faces can form a wedge shape or they can be parallel. Typical gate valves should never be used for regulating flow, unless they are specifically designed for that purpose. On opening the gate valve, the flow path is enlarged in a highly nonlinear manner with respect to percent of opening.

NOTE: The chart above only lists out some common composition of steel check valve parts. We may provide other different parts material composition according to the customer's request or the actual valve working condition.

1. Gate valve are normally used for on-off service and are not recommended for throttling service.

2. Gate valves are normally installed in horizontal pipe runs with the stem vertical. They can also be installed in vertical or horizontal pipe runs with the stem other than vertical, but may require special construction depending on valve size, service conditions and materials. WHEN PURCHASING VALVES FOR OTHER THAN NORMAL INSTALLATION, THE VALVE ORIENTATION SHOULD BE SPECIFIED.

3. Flexible or split wedges are recommended for service above 500 ℉ to avoid wedge binding due to thermal expansion. This may occur if the valve is closed when cold, and then heated to operating temperature.

4. Threaded seat rings should be lock welded to the body when used in high velocity （turbulent） or thermal cycling services to avoid loosening. Please specify.

5. After closing a gate valve with sufficient force to develop shutoff, the stem should be backed off slightly （1/8 to 1/4 turn） to relieve stem load. This will enable the stem to expand slightly without binding or damaging the valve and will not affect shutoff.

If you have Cast Steel Gate valve any enquiry about quotation or cooperation, please feel free to email us at sale@dfcvalve.com or use the following enquiry form. WINDMILL sales representative will contact you within 24 hours. Thank you for your interest in our Cast Steel Gate valve products.